Supply Agreement Termination (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Dec. 31, 2018	Sep. 30, 2019	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Supply commitment, contract termination agreement, consideration	$ 24,900
Supply commitment, contract termination agreement, cash proceeds	21,300
Assets received as part of the supply agreement termination	3,600
Deferred contract termination fee, current	9,489	$ 9,623	$ 9,623
Deferred contract termination fee, noncurrent	$ 15,371	8,019	8,019
Deferred contract termination fee, amortization		$ 2,400	$ 7,200